Mark A. Barnett

Partner - Boston

Bio photo for Mark Barnett

Contact Information


617.832.7000 Download vCard

As co-chair of Foley Hoag’s Energy & Cleantech Group, and head of the firm’s Renewable Energy Project Finance and Development Practice, Mark Barnett has an extensive business law practice focused on the energy and cleantech sectors. Mark works closely with clients developing innovative technologies and business approaches to solving energy and sustainability challenges, advising emerging and high growth companies in all aspects of strategic development, financings and acquisitions, intellectual property and industry-specific regulatory and policy matters. He also leads the firm’s renewable energy project finance practice with a particular focus on solar energy project development and finance, working with a broad range of developers, project sponsors and investors in this dynamic and growing sector.

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  • Yale Law School, J.D.
  • Yale University, B.A.

Representative Experience

  • Represented Soltage, LLC in connection with a $140 million equity capital partnership with Basalt Infrastructure Partners LLP and various joint ventures, project acquisitions, tax equity and back leverage financings, and other financing transactions.
  • Advised AEGON USA Realty Advisors (an affiliate of Transamerica) as a tax equity investor in two North Carolina solar portfolios totaling 100 MW and 30 MW respectively.
  • Advised GoldenSet Capital Partners in connection with $50 million sponsor equity and simultaneous tax equity investments for a portfolio of Massachusetts solar projects.
  • Represented SolidEnergy Systems, a breakthrough energy storage technology developer, in connection with its $35 million Series C Financing.
  • Advise Ultra Capital, LLC, a clean infrastructure fund, in fund formation and other financing transactions.
  • Counsel Energetic Insurance, Inc. in its initial $2.5 million financing round.
  • Represent BlueWave Solar on broad range of solar financing and acquisition transactions.
  • Advised Nexamp, Inc. in various financing transactions with Diamond Generating Corp., a wholly owned subsidiary of Mitsubishi Corporation.
  • Advised Altaeros Energies, Inc. on ventures financings led by Softbank Corp.
  • Represented CleanCapital, LLC in negotiation of significant joint ventures with BlackRock’s Renewable Power Group and CarVal Investors to acquire portfolios of operating solar energy projects
  • Advise PRIME Coalition, Inc. on various innovative financing transactions to support early stage breakthrough clean energy technology.
  • Represented True Green Capital Management LLC, an institutional asset manager specializing in distributed power generation with a current focus on distributed commercial PV solar, in the closing of its $113M fund, the True Green Capital Opportunity Partnership, L.P.
  • Advised Sun Catalytix, a leading flow battery developer, on various financings and sale to Lockheed Martin Corporation.
  • Represented Greenwood Energy, in US solar financing activities, including hybrid construction and permanent lending facilities, tax equity financings and back leverage lending facilities
  • Counseled a leading residential energy efficiency provider in its $25 million Series D financing.
  • Represented Strata Solar in a joint venture with Lodestar Energy to develop and finance six solar projects in Massachusetts, including representation in connection with a tax equity financing and a back leverage debt financing.
  • Advise a new venture fund focused on green chemistry for safer consumer products.


  • Recognized as a ‘#Solar100 Thought Leader’ by kWh analytics (2018)
  • Listed as one of ‘The Top 100 People Shaping Cleantech on Twitter’ by CleanTechnica (2015) 
  • Listed as a ‘Rising Star’ in Super Lawyers' Massachusetts Rising Stars: A Comprehensive Listing on the Best Young Lawyers in Massachusetts (2009, 2013-2014)


  • Ceres President’s Council, Member
  • PRIME Coalition, Pro Bono Counsel
  • Cleantech Open, Mentor
  • MassChallenge, Mentor
  • New England Clean Energy Council, Policy Committee
  • American Bar Association, Member
  • Ceres Clean Trillion Project, Advisor
  • Brookline Education Foundation, Board Member
  • Boston Bar Associations, Member

  • Speaker, “Nonprofits and Solar Power,” Boston Bar Association (January 22, 2020) 
  • Moderator, NECEC Cleantech Financial Innovation Summit (June 20, 2019) 
  • Moderator, “Financing Solar and Storage,” Solar Power Northeast (February 6, 2019) 
  • Moderator, “How Corporate VCs Can Spur Innovation Within Corporates and the Ecosystem: The Engie New Ventures, Redaptive, and Connected Energy Case Studies,” NECEC (December 6, 2018) 
  • Moderator, “Solar + Storage,” Foley Hoag LLP and NECEC (May 1, 2018) 
  • Moderator, “Emerging Trends Series: Solar + Storage,” NECEC (March 13, 2018)
  • Speaker, “Financing Solar + Storage,” Solar Power Northeast (February 5, 2018) 
  • Judge, InnovateMass program, Massachusetts Clean Energy Center (2017) 
  • Speaker/Moderator, “Innovative Financial Models within Renewable Energy & Energy Efficiency,” Sustainatopia (October 3, 2017)
  • Panelist, NECEC Cleantech Financial Innovation Summit (June 22, 2017) 
  • Speaker, “Innovative Financial Models within Renewable Energy,” Sustainatopia (October 11, 2016)
  • Moderator, “Energy Storage Forum,” NECEC and Foley Hoag LLP (September 20, 2016) 
  • Moderator, "Community Solar Financing," Solar Power International (September 13, 2016) 
  • Moderator, “Financial Innovations at the Scale Up & Deployment Stage of Clean Energy Solutions,” NECEC Cleantech Financial Innovation Summit (June 15, 2016)
  • Panelist, “Technology and Business Model Innovation,” BSAS Investing in Clean Energy Seminar (June 9, 2016)
  • Panelist, “The National Energy Efficiency Registry,” ACEEE Energy Efficiency Finance Forum (May 24, 2016)
  • Panelist, “Clean Energy After COP21,” NECEC (February 10, 2016)
  • Panelist, “Enabling Clean Energy Implementation Through Policy, Technology/Innovation and Finance,” 21st Conference of the Parties to the United Nations Framework Convention on Climate Change (COP21/CMP11), (November 30-December 11, 2015)
  • Panelist, “Investing in Solar," Sustainatopia Conference, Boston, MA (November 17, 2015)
  • Panelist, “Development and Financing Issues,” Novogradac Financing Renewable Energy Conference (November 6-7, 2014)
  • Panelist, “Navigating Climate Risk and Investing for Impact,” Ceres, Black Coral Capital and PRIME Coalition (November 4, 2014)
  • Panelist, "Creative Solar Financing Matching Funds & Projects, "Solar Power Mid-Atlantic Conference presented by Solar Energy Industries Association (SEIA), (September 9-10, 2014)
  • Panelist, “Drivers of Cleantech Innovation: Policy, Capital, and IP,” Boston Bar Association Roundtable (February 7, 2014)
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Bar Admissions

  • Massachusetts
  • Connecticut